| Original Articles |
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Widely Tunable Femtosecond Soliton Pulse Generation by Using Soliton-Frequency Shift in a Photonic Crystal Fibre |
| CHENG Chun-Fu;WANG Xiao-Fang;SHEN Bai-Fei |
| Laboratory for High Intensity Optics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800 |
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| Cite this article: |
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CHENG Chun-Fu, WANG Xiao-Fang, SHEN Bai-Fei 2004 Chin. Phys. Lett. 21 1965-1968 |
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Abstract Femtosecond Raman soliton generation, tunable from 800 to 1044nm, has been theoretically investigated for a photonic crystal fibre pumped by a 200-fs pulse. A highly nonlinear photonic crystal fibre with a length of only 57.7cm and a nonlinear coefficient of 0.075(Wm)-1 is used to achieved such a broadband. It is found that the spectral bandwidth increases with the input peak power. In particular, it is also found that the output wavelengths of the resulting sub-40fs Raman solitons can also be tuned effectively by varying the initial pulse chirp. There exists an optimal positive chirp which maximizes the bandwidth, corresponding to the formation of only one long-wavelength Raman soliton.
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| Keywords:
42.65.Re
42.81.Dp
42.72.Ai
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Published: 01 October 2004
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| PACS: |
42.65.Re
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(Ultrafast processes; optical pulse generation and pulse compression)
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42.81.Dp
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(Propagation, scattering, and losses; solitons)
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42.72.Ai
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(Infrared sources)
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